The insurance firm is due to take floors 18-24 and floor 45.
The letting secures another 20% of the building’s total. The average headline
rent achieved is reported to be £62.75 per sq ft.

The Leadenhall Building is due for completion in 2014 and
following this deal is now 51% pre-let. Aon have already pre-let 190,000 sq ft
of space.

This latest letting underscores the attraction of Tower
headquarters and the market-leading rents insurance and financial occupiers are
willing to offer to re-locate into international class buildings.